The steering column on Polaris machines is attached by an aluminum extrusion which the steel column passes through. With two metals in contact, you sometimes get bi-metallic corrosion in there when it runs out of lubrication and/or gets wet. On many machines it is difficult to get grease in there because of access, access problems which also can lead to breaking the zerk off. The best solution is to pull the engine, take off the column and use a vise, wrench, Aero-Kroil or other penetrating fluid to get things moving and then grease well after it's loose. Of course that method is quite a bit of work and hassle so hopefully the other ways will work for you. You do need to get some kind of good lubricant in there though once you get it loose or it'll happen again.